Transaction Broadcast Error on special characters in comment

[gryter]

While posting what's likely unsupported characters an error message regarding posting authority comes up.

Error message should be appropriate to the action. Have not tested on posts, only comments.

Action: Copy/pasted the special characters that make up the encoding of a png image that's renamed into a text file.

Result: Transaction Broadcast Error RPCError: missing required posting authority:Missing Posting Authority guiltyparties

[roadscape]

Could you try pasting the text into this issue so we can attempt to reproduce?